1--4
62--11161
1.4 TORQUE SPECIFICATION
Screws, bolts and nuts must be tightened to the specified torque using a torque wrench. Several screws, bolts and
nuts such as those used on the cylinder head must be tightened in the proper sequence and at the proper torque.
1.4.1 Torque Specifications For Special Use Screws, Bolts and Nuts
In removing and applying the screws, bolts and nuts marked with “*”, a pneumatic wrench or similar tool, if employed,
must be used with care. Failure to do so may result in stripped or seized screws, bolts and nuts.
When replacing “*” marked screws, bolt and nuts, apply engine oil to their threads and seats before reassembly.
The letter “M” in size and pitch means that the screw, bolt or nut dimension is metric. The size is the nominal outside
diameter in mm of the threads. The pitch is the nominal distance in mm between two threads.
Item
Size x Pitch
N.m
kgf.m
ft--lbs
Cylinder Head Cover Bolt
M6 x 1.0
6.9 to 11.3
0.7 to 1.15
5.1 to 8.3
Injection Pipe Retaining Nut
M12 x 1.5
24.5 to 34.3
2.5 to 3.5
18.1 to 25.3
Overflow Pipe Retaining Bolt
M12 x 1.5
19.6 to 24.5
2.0 to 2.5
14.5 to 18.1
Nozzle Holder Assembly
M20 x 1.5
49.0 to 68.6
5.0 to 7.0
36.2 to 50.6
Glow Plug
M8 x 1
7.85 to 14.7
0.8 to 1.5
5.8 to 10.8
*Rocker Arm Bracket Bolt
M6 x 1
9.8 to 11.3
1.0 to 1.15
7.2 to 8.3
*Cylinder Head Bolt
M8 x 1.25
37.3 to 42.2
3.8 to 4.3
27.5 to 31.1
*Fan Drive Pulley Bolt
M12 x 1.5
117.7 to 127.5
12.0 to 13.0
86.8 to 94.0
*Idle Gear Shaft Mounting Bolt
M6 x 1
9.8 to 11.3
1.0 to 1.15
7.2 to 8.3
Oil Pump Mounting Bolt
M8 x 1.25
17.7 to 21.6
1.8 to 2.2
13.0 to 15.9
*Connecting Rod Bolt
M7 x 0.75
26.5 to 30.4
2.7 to 3.1
19.5 to 22.4
*Flywheel Bolt
M10 x 1.25
53.9 to 58.8
5.5 to 6.0
39.8 to 43.4
*Bearing Case Cover Mounting Bolt
M6 x 1
9.8 to 11.3
1.00 to 1.15
7.2 to 8.3
*Main Bearing Case Bolt 2
M7 x 1
26.5 to 30.4
2.7 to 3.1
19.5 to 22.4
*Main Bearing Case Bolt 1
M6 x 1
12.7 to 15.7
1.3 to 1.6
9.4 to 11.6
Nozzle Holder
--
34.3 to 39.2
3.5 to 4.0
25.3 to 28.9
Overflow Pipe
--
19.6 to 24.5
2.0 to 2.5
14.5 to 18.1
Nozzle Holder Assembly
--
49.0 to 68.6
5.0 to 7.0
36.2 to 50.6
Oil Pressure Switch
PT1/8
14.7 to 19.6
1.5 to 2.0
10.8 to 14.5
Starter (C Terminal Nut) (CT2--29--TV)
M8
7.8 to 9.8
0.8 to 1.0
5.8 to 7.2
Starter (B Terminal Nut) (CT3--44--TV)
M8
8.8 to 11.8
0.9 to 1.2
6.5 to 8.7
Starter (C Terminal Nut) (CT3--44--TV)
M8
5.9 to 11.8
0.6 to 1.2
4.3 to 8.7
Drain Plug W/ Copper Gasket
M12 x 1.25
32.4 to 37.3
3.3 to 3.8
23.9 to 27.5
Drain Plug W/ Copper Gasket
M22 x 1.5
63.7 to 73.5
6.5 to 7.5
47.0 to 54.2
Drain Plug W/ Rubber Coated Gasket
M12 x 1.25
44.1 to 53.9
4.5 to 5.5
32.5 to 39.8
1.4.2 Torque Specifications For General Use Screws, Bolts and Nuts
Standard Screw and Bolt Grade 4
Special Screw and Bolt Grade 7
N.m
kgf.m
ft--lbs
N.m
kgf.m
ft--lbs
M6
7.9 to 9.3
0.80 to 0.95
5.8 to 6.9
9.8 to 11.3
1.00 to 1.15
7.23 to 8.32
M8
17.7 to 20.6
1.8 to 2.1
13.0 to 15.2
23.5 to 27.5
2.4 to 2.8
17.4 to 20.3
M10
39.2 to 45.1
4.0 to 4.6
28.9 to 33.3
48.1 to 55.9
4.9 to 5.7
35.4 to 41.2
M12
62.8 to 72.6
6.4 to 7.4
46.3 to 53.5
77.5 to 90.2
7.9 to 9.2
57.1 to 66.5
Screw and bolt material grades are shown by numbers punched on the screw and bolt heads. Prior to tightening, be
sure to check out the numbers as shown below
Punched Number
Screw And Bolt Material Grade
None or 4
Standard Screw And Bolt SS41, S20C
7
Special Screw And Bolt S43C, S48C (Refined)
